3 years ago

A ball is kicked with an inicial velocity of

Mathematics

1 answer:

vesna_86 [32]3 years ago

4 0

Answer:

bbbbbbbbbbbbbbbbbbbbbb

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Sofia hits a softball straight up. the equation h= -16t^2 + 90t models the height h, in feet, of the ball after t seconds. How l

andrezito [222]

It is in the air 5.625 seconds.

Using the quadratic formula,

$t=\frac{-b\pm \sqrt{b^2-4ac}}{2a}
\\
\\=\frac{-90\pm \sqrt{90^2-4(-16)(0)}}{2(-16)}
\\
\\=\frac{-90\pm \sqrt{8100-0}}{-32}
\\
\\=\frac{-90\pm \sqrt{8100}}{-32}=\frac{-90\pm90}{-32}
\\
\\=\frac{-90+90}{-32}\text{ or }\frac{-90-90}{-32}=\frac{0}{32}\text{ or }\frac{-180}{-32}
\\
\\=0\text{ or }5.625$

0 is when the ball is first launched, 5.625 is when it hits the ground again.

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3 years ago

What is the slope of the line that contains the point (-2,6) and (6,-3)?

VikaD [51]

We can find the slope from (y2-y1)/(x2-x1) . So (-3-6)/(6+2) = -9/8

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3 years ago

Roger and Mary have an online account for buying movies. Roger's account balance is -$25

padilas [110]

Answer:

Rodgers simply because owing 25 dollars is more than 10

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